Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1998-03-18
1999-06-22
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264342R, 425577, B29C 4573
Patent
active
059140852
ABSTRACT:
An actuator for an aerosol container, comprising a body forming an inlet, a top surface (16) defining a multitude of discharge slits (20), and a multitude of body passageways (22) to conduct fluid from the inlet to the discharge slits. Each of the body passageways has a pouch shape, including narrower upper (22a) and lower portions (22b) and a wider mid portion (22c). When the actuator is used to dispense foam from an aerosol container, the shape of the body passageways has several advantages. First, that shape helps the foam to expand as it passes outward through the dispenser, and second, after the container has ben used to dispense a quantity of foam, the shape of the body passageways helps to draw back into the actuator any excess foam remaining on the outside of the actuator. Preferably, the actuator is formed in a plastic injection molding process, and the body passageways of the actuator are formed into the desired shape as the plastic cools during the molding process.
REFERENCES:
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patent: 5820803 (1998-10-01), Hashimoto
Whelan, A., Injection Moulding Machines, pp. 248-251, 1984.
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